Apple’s latest update for the iPhone 6s is here and today we want to take a look at the most important things you need to know about the iPhone 6s iOS 9.2.1 update, its problems, and the update that could replace it.

iPhone 6s users first got a taste of the iOS 9.2.1 last year after Apple released it into its beta programs for developers and the public. The iOS 9.2.1 beta confirmed the update but it didn’t confirm an official release date. That remained a mystery up until this week.

Earlier this week, Apple pulled the iOS 9.2.1 update out of beta and released to iPhone 6s users around the world. The iPhone 6s iOS 9.2.1 update is now available via your Settings or through iTunes.

The iOS 9.2.1 update is an incremental update which means it comes without glamorous features and enhancements. Instead, it’s focused on performance.

Apple’s latest iPhone 6s update is small but it’s still important and that’s why we want to take a close look at the essential details.

This iPhone 6s iOS 9.2.1 roundup takes a look at the update’s performance after a few days of use, lingering problems, new iOS 9.2.1 problems, iOS 9.3, and more. Keep these details in mind as we push deeper into the month toward the next iOS 9 release for Apple’s flagship.

iPhone 6s Performance: Three Days Later

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We've been using the iPhone 6s iOS 9.2.1 update since its release on Tuesday and here's what we've found in the early going.

The iPhone 6s iOS 9.2.1 update is performing at a high level on our versions of Apple's flagship. (We're testing the iOS 9.2.1 update on an AT&T and Verizon model.)

Battery life is holding up and we continue to get a full day of use when using a mixture of Wi-Fi and LTE connectivity.

LTE, Wi-Fi and Bluetooth are all strong, our apps are behaving at the three day mark, and we haven't run into any experience-breaking issues. Not yet at least.

The keyboard lag that appeared shortly after the installation completed has vanished like we knew it would. iOS 9.2.1 is fast and fluid on the iPhone 6s.

At this point, our stance hasn't changed. Most of you will want iOS 9.2.1 (bug fixes, security enhancements) but if you're feeling leery, take your time. iOS 9.2.1 will probably be around for a few more weeks at least so you can be patient.